<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>Insert title here</title>
</head>
<body>
<div>首页</div>
<c:if test="${ username==null }">
    <a href="${pageContext.request.contextPath}/login.jsp">登录</a><br>
</c:if>
<c:if test="${ username!=null }">
	${ username },
    <a href="${pageContext.request.contextPath}/clear-cookie">退出:等待3s刷新登录后的首页</a><br>
</c:if>
</body>
</html>